This easy to build Tachometer Circuit is a small DIY tool to check speed of rotating shaft or disc. We use tachometer to know how fast shaft or wheel spin in RPS (revolutions per second). This simple circuit uses two 7-segment displays and one slotted opto sensor MOC7811 where all parts are easy to find. […]
Meters and Testers
Cable Tracer Circuit
Cable Tracer Circuit is of two part device. It help find and check right cable in group or inside wall. It have two parts: transmitter and receiver. People use it in telecom, network, fixing wires, security system and audio/video setup. Circuit Working for Cable Tracer Transmitter Circuit: Parts List: Category Component Quantity Resistors 2.2k 1/4 […]
Hand Grip Strength Tester Circuit
Do anyone want to test their grip strength? Like small hand wrestling with ourselves? This Hand Grip Strength Tester Circuit is a hand grip tester. It uses simple electronic parts to check how hard we can squeeze. More squeeze then more lights turn ON which shows our grip power. Circuit Working: Parts List: Component Value/Type […]
Simple Transistor Tester Circuit
Transistors are small switches. But how to check if they work or what type they are? This Simple Transistor Tester Circuit is like a transistor checker. It is an easy DIY project which uses few parts. It tells us if transistor is good or bad and also shows if its NPN or PNP like two […]
Simple Micro Ampere Meter Circuit
Simple Micro Ampere Meter Circuit is like a special tool to measure small electric. Normal tools too are strong but are not good for tiny current. But this one uses super sensitive meter microammeter or maybe special setting on multimeter to find very small electric flow like millionth of amp. Other parts like resistors and […]
Simple Electronic Component Tester Circuit
This Simple Electronic Component Tester Circuit works like doctor for ones electronic parts. Before we make any cool thing one can use this tester to check parts like resistor, capacitor, transistor and many more. Tester shows if the parts are good or bad so we do not waste time with broken parts in our project. […]